/**
 * 
 */
package t4j.concurrency.waxomatic2;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

class Car {
	private Lock lock = new ReentrantLock();

	private Condition condition = lock.newCondition();

	private boolean waxOn = false;

	public void waxed() {
		lock.lock();

		try {
			waxOn = true;
			condition.signalAll();

		} finally {
			lock.unlock();
		}
	}
	
	public void buffed(){
		lock.lock();
		try{
			waxOn = false;
			condition.signalAll();
		}finally{
			lock.unlock();
		}
	}
	
	public void waitForWaxing() throws InterruptedException{
		lock.lock();
		try{
			while(waxOn == false)
				condition.await();
		}finally{
			lock.unlock();
		}
	}
	
	public void waitForBuffing() throws InterruptedException{
		lock.lock();
		
		try{
			while(waxOn == true)
				condition.await();
		}finally{
			lock.unlock();
		}
	}
}

class WaxOn implements Runnable{
	private Car car;

	public WaxOn(Car c) {
		car = c;
	}

	public void run() {
		
		try{
			while(!Thread.interrupted()){
				System.out.print("Wax On! ");
				TimeUnit.MILLISECONDS.sleep(200);
				car.waxed();
				car.waitForBuffing();
			}
		}catch(InterruptedException e){
			System.out.println("Exiting via interrupt");
		}
		
		System.out.println("Ending Wax On task");	
	}
}

class WaxOff implements Runnable{
	private Car car;
	

	public WaxOff(Car c) {
		car = c;
	}

	@Override
	public void run() {
		
		try{
			while(!Thread.interrupted()){
				car.waitForWaxing();
				System.out.print("Wax Off! ");
				TimeUnit.MILLISECONDS.sleep(200);
				car.buffed();
			}
		}catch(InterruptedException e){
			System.out.println("Exiting via interrupt");
		}
		
		System.out.println("Ending Wax Off task");
	}
	
}

public class WaxOMatic2 {

	public static void main(String[] args) throws InterruptedException {
		Car car = new Car();
		ExecutorService exec = Executors.newCachedThreadPool();
		
		exec.execute(new WaxOff(car));
		exec.execute(new WaxOn(car));
		TimeUnit.SECONDS.sleep(5);
		exec.shutdownNow();
	}
}
